Wrong code in error handling chapter "Error handling, try catch"

There is a wrong code in the Error Handling chapter. Refer to the image and code below:

try {
  user = { /*...*/ };
} catch (err) {
  if (err instanceof ReferenceError) {
    alert('ReferenceError'); // "ReferenceError" for accessing an undefined variable
  }
}

This should output as follows in a browser environment.

and, nothing should be there in the terminal in Node js env. as nothing is being returned or logged.
But, as per the website when you ran the code, it shows this:

For reference it's the second code snippet under: https://javascript.info/try-catch#rethrowing

It might be using "use strict" internally, but its quite misleading.

Ouvrez le chapitre Error Handling au deuxième extrait de code sous « Rethrowing » et exécutez l’exemple présenté dans un navigateur et dans Node.js. Comparez la sortie observée aux captures d’écran de l’issue, puis corrigez l’extrait ou son explication afin que le comportement documenté corresponde dans les deux environnements.